Exam 3 Flashcards
First air to air fueling
Nov 12 1921
Wesley May
First plane to plane refueling
June 27 1923
Capt Lowell Smith
Lt. John P Richter
fuel system purpose
deliver fuel to engines safely under a wide range of operational conditions
how aircraft fuel needs to be delivered
uniform flow
clean fuel
constant pressure
delivered at various altitudes and attitudes
delivered in any reasonable maneuver
fuel system must be able to monitor
quantity of fuel
fuel pressures
fuel temperatures
fuel flow rates
When do aircraft fuel indicators have to be accurate
only when empty
what must the reliability of fuel systems be
not result in power interruption for more than 20 seconds for piston engine
will not cause flame out for turbine engine
independence of aircraft fuel systems
each tank should be able to feed each aircraft engine
gravity fed system
bottom of tank must be high enough to provide enough pressure
uses gravity to cause fuel flow
advantage of gravity fed system
“both” option takes fuel from both wings equally
primer
subsystem
on non fuel injected aircraft
draws fuel from carburetor inlet bowl or fuel strainer
pressure feed system
uses boost pump to move fuel
fuel tanks too low to provide fuel pressure
wing tanks same level as carburetor
fuel pumps in pressure feed
fuel boost pump - starts engine
engine driven pump - normal operation
bladder fuel tank downside
want to make sure always full
needs to be replaced every 15 years
integral fuel type
wet wing
sealed with fuel proof sealing
manufactured when aircraft is built
bladder fuel tank
rubberized synthetic bag manufactured to conform to space in wing
uses aircraft structure to support weight of fuel
purpose of grounding during aircraft fueling
fuel flowing in lines create static charge build up
prevents static discharge and potential explosion in fuel system
Jettison System
dumps fuel overboard in event of emergency to lower weight to landing weight
when is a jettison system needed
if max TO weight is greater than 105% certified landing weight
what does fire protection include
fire detection
fire control
Class A compartment
crew and pax
visually detected
reached, combated by flight crew
Class B Compartment
cargo and baggage
must have sufficient access to enable crew member to reach all parts of compartment effectively with a portable fire extinguisher while in flight
What use class A and B be equipped with
smoke detector or fire detector
Class C compartment
inaccessible compartments
fire detection and fighting done by remote sensors and fire control
Class D Compartments
inaccessible cargo and baggage
no fire detection
designed so fire will be confined to that area
what must all classes of compartments have
ventilation must be controlled
Class E compartment
cargo aircraft
no windows, special shades fire resistant
must have smoke/fire detector
able to shut off flow to compartment
controllable from flight deck
able to isolate smoke, flames, gases from flight deck
Spot detectors
monitor one specific location
produces current when heated
continuous loop detector
monitors greater area
ceramic changes resistance with heat, more current flow = detection
smoke detection purpose
deter smoke present in a specific zone
photoelectric cell smoke detector
air sampled. if 10% visible smoke particles, the light sensor sends electrical signal to the warning system controller
